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# Copyright (C) 2005-2015 Quentin Sculo <squentin@free.fr>
#
# This file is part of Gmusicbrowser.
# Gmusicbrowser is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation
package Play_mpv;
use strict;
use warnings;
use IO::Socket::UNIX;
use JSON::PP;
use Time::HiRes 'sleep';
use POSIX ':sys_wait_h'; #for WNOHANG in waitpid
#$SIG{CHLD} = 'IGNORE'; # to make sure there are no zombies #cause crash after displaying a file dialog and then runnning an external command with mandriva's gtk2
#$SIG{CHLD} = sub { while (waitpid(-1, WNOHANG)>0) {} };
my (@cmd_and_args,$ChildPID,$WatchTag,$WatchTag2,@pidToKill,$Kill9);
my $sockfh;
my (%supported,$mpv);
my $preparednext;
my ($File_is_current,$Called_from_eof,$gmb_file,$mpv_file,$Last_messages);
my $initseek;
my $watcher;
my $SOCK = $::HomeDir."gmb_mpv_sock";
$::PlayPacks{Play_mpv}=1; #register the package
sub init
{ undef %supported;
$mpv= $::Options{mpv_cmd};
if ($mpv && !-x $mpv && !(::first { -x $_ } map $_.::SLASH.$mpv, split /:/, $ENV{PATH}))
{ $mpv=undef;
}
$mpv ||= ::first { -x $_ } map $_.::SLASH.'mpv', split /:/, $ENV{PATH};
$mpv=undef unless $mpv && check_version();
return unless $mpv;
return bless {RG=>1,EQ=>1},__PACKAGE__;
}
sub check_version
{ return unless $mpv;
my $output= qx/$mpv -V/;
my ($ok,$version);
if ($output=~m/mpv\s*(\d+)\.(\d+)(\S+)?/i) { $ok= $1>0 || $2>=7; $version= "$1.$2".($3||"") } #requires version 0.7 or later
elsif ($output=~m/mpv\s*(git-[[:xdigit:]]+)/i) { $ok=1; $version=$1; } #assume git version is ok
else { warn "mpv: error looking up mpv version\n"; }
warn "mpv: found mpv version $version\n" if $version && ($::debug || !$ok);
if (!$ok) { warn "mpv version earlier than 0.7 are not supported -> mpv backend disabled\n" }
return $ok;
}
sub supported_formats
{ return () unless $mpv;
unless (keys %supported)
{for (qx($mpv --ad=help))
{ if (m/:mp3\s/) {$supported{mp3}=undef}
elsif (m/:vorbis\s/) {$supported{oga}=undef}
elsif (m/:mpc\d/) {$supported{mpc}=undef}
elsif (m/:flac\s/) {$supported{flac}=undef}
elsif (m/:wavpack\s/) {$supported{wv}=undef}
elsif (m/:ape\s/) {$supported{ape}=undef}
elsif (m/:aac\s/) {$supported{m4a}=undef}
}
}
return keys %supported;
}
sub send_cmd
{ return unless $sockfh;
my @args=@_;
my $cmd = JSON::PP->new->encode({command => \@args});
print $sockfh "$cmd\n";
warn "MPVCMD: $cmd\n" if $::debug;
}
sub launch_mpv
{ $preparednext=undef;
@cmd_and_args=($mpv, '--input-unix-socket='.$SOCK, qw/--idle --no-video --no-input-terminal --really-quiet --gapless-audio=weak --softvol-max=100 --mute=no --no-sub-auto/);
push @cmd_and_args,"--volume=".convertvolume($::Volume);
push @cmd_and_args,"--af-add=".get_RG_opts() if $::Options{use_replaygain};
push @cmd_and_args,"--af-add=\@EQ:equalizer=$::Options{equalizer}" if $::Options{use_equalizer};
push @cmd_and_args,split / /,$::Options{mpvoptions} if $::Options{mpvoptions};
warn "@cmd_and_args\n" if $::debug;
$ChildPID=fork;
if (!defined $ChildPID) { warn "gmusicbrowser_mpv : fork failed : $!\n"; ::ErrorPlay("Fork failed : $!"); return }
elsif ($ChildPID==0) #child
{ exec @cmd_and_args or print STDERR "launch failed (@cmd_and_args) : $!\n";
POSIX::_exit(1);
}
#wait for mpv to establish socket as server
for (0 .. 200)
{ $sockfh = IO::Socket::UNIX->new(Peer => $SOCK, Type => SOCK_STREAM);
last if $sockfh || (waitpid($ChildPID, WNOHANG) != 0);
warn "gmusicbrowser_mpv: could not connect to socket; retrying\n" if $::debug;
sleep 0.01;
}
unless ($sockfh)
{ handle_error("failed to connect to socket (probably failed to launch mpv): $!");
return;
}
$sockfh->autoflush(1);
$sockfh->blocking(0);
$WatchTag = Glib::IO->add_watch(fileno($sockfh),'hup',\&_eos_cb);
$WatchTag2= Glib::IO->add_watch(fileno($sockfh),'in',\&_remotemsg);
$watcher = {};
::Watch($watcher,'NextSongs', \&append_next);
send_cmd('observe_property', 1, 'playback-time');
send_cmd('observe_property', 1, 'path');
send_cmd('request_log_messages', 'error');
return 1;
}
sub Play
{ my (undef,$file,$sec)=@_;
launch_mpv() unless $ChildPID && $sockfh;
return unless $ChildPID;
$Last_messages="";
$gmb_file=$file;
warn "playing $file (pid=$ChildPID)\n" if $::Verbose;
# gapless - check for non-user-initiated EOF
if ($Called_from_eof && $preparednext && $preparednext eq $gmb_file && $gmb_file eq $mpv_file)
{ $File_is_current=1;
return;
}
$File_is_current=-1;
$initseek = $sec;
send_cmd('loadfile',$file);
send_cmd('playlist_clear');
}
sub append_next
{ $preparednext=undef;
send_cmd('playlist_clear');
if ($::NextFileToPlay && $::NextFileToPlay ne $gmb_file)
{ send_cmd('loadfile',$::NextFileToPlay,'append');
$preparednext= $::NextFileToPlay;
}
}
sub _remotemsg
{ my $eof;
while (my $line=<$sockfh>)
{ my $msg= JSON::PP->new->decode($line); # use JSON::PP->new->decode instead of decode_json (equivalent to JSON::PP->new->utf8->decode) because decode_json converts to utf8, which gives error with invalid utf8 filenames (only happens for mpv >0.9.0)
warn "mpv raw-output: $line" if $::debug;
if (my $error=$msg->{error})
{ warn "mpv error: $error" unless $error eq 'success';
}
elsif (my $event=$msg->{event})
{ if ($event eq 'property-change' && $msg->{name} eq 'path') { $mpv_file= $msg->{data}||""; } # doesn't happen when previous file is same as new file
elsif ($event eq 'start-file') { $File_is_current=0 if $File_is_current<1; }
elsif ($event eq 'tracks-changed' && $File_is_current>=0)
{ $File_is_current= $mpv_file eq $gmb_file;
last if $eof; #only do eof now to catch log-message that are only sent after end-file and start-file
}
elsif ($File_is_current<1) {} #ignore all other events unless file is current
elsif ($event eq 'property-change' && $msg->{name} eq 'playback-time' && defined $msg->{data})
{ ::UpdateTime($msg->{data}); }
elsif ($event eq 'end-file') { $eof=1; } # ignore EOF signal on user-initiated track change as $File_is_current is not true in those cases
elsif ($event eq 'file-loaded') { SkipTo(undef,$initseek) if $initseek; $initseek=undef; }
elsif ($event eq 'log-message')
{ my $error= $msg->{text};
chomp $error;
my $time= $::PlayTime||0;
$Last_messages.= sprintf " %02d:%02d [%s] %s\n",
int($time/60), $time%60, $msg->{prefix}, $error;
}
}
}
handle_eof() if $eof;
return 1;
}
sub handle_eof
{ if ($::PlayTime < Songs::Get($::SongID,'length')-5) { handle_error(_"Playback ended unexpectedly.") }
else { $Called_from_eof=1; ::end_of_file(); $Called_from_eof=0; }
}
sub handle_error
{ my $error=shift;
Stop();
my $details=_("File").":\n$gmb_file\n\n";
$details.= _("Last messages:")."\n$Last_messages\n" if $Last_messages;
$details.= _("Command used:")."\n@cmd_and_args";
::ErrorPlay($error,$details);
}
sub _eos_cb
{ my $error;
if ($ChildPID && $ChildPID==waitpid($ChildPID, WNOHANG))
{ $error=_"Check your audio settings" if $?;
}
while (waitpid(-1, WNOHANG)>0) {} #reap dead children
handle_error ($error or "mpv process closed unexpectedly.");
return 1;
}
sub Pause
{ send_cmd('set', 'pause', 'yes');
}
sub Resume
{ send_cmd('set', 'pause', 'no');
}
sub SkipTo
{ ::setlocale(::LC_NUMERIC, 'C');
my $sec="$_[1]";
::setlocale(::LC_NUMERIC, '');
send_cmd('seek', $sec, 'absolute');
}
sub Stop
{ if ($WatchTag)
{ Glib::Source->remove($WatchTag);
Glib::Source->remove($WatchTag2);
$WatchTag=$WatchTag2=undef;
}
if ($ChildPID)
{ send_cmd('quit');
Glib::Timeout->add( 100,\&_Kill_timeout ) unless @pidToKill;
$Kill9=0; #_Kill_timeout will first try INT, then KILL
push @pidToKill,$ChildPID;
undef $ChildPID;
}
if ($sockfh)
{ shutdown($sockfh,2);
close($sockfh);
unlink $SOCK;
undef $sockfh;
}
if ($watcher)
{ ::UnWatch($watcher,'NextSongs');
undef $watcher;
}
}
sub _Kill_timeout #make sure old children are dead
{ while (waitpid(-1, WNOHANG)>0) {} #reap dead children
@pidToKill=grep kill(0,$_), @pidToKill; #checks to see which ones are still there
if (@pidToKill)
{ warn "Sending ".($Kill9 ? 'KILL' : 'INT')." signal to @pidToKill\n" if $::debug;
if ($Kill9) {kill KILL=>@pidToKill;}
else {kill INT=>@pidToKill;}
$Kill9=1; #use KILL if they are still there next time
}
return @pidToKill; #removes the timeout if no more @pidToKill
}
sub AdvancedOptions
{ my $vbox=Gtk2::VBox->new(::FALSE, 2);
my $sg1=Gtk2::SizeGroup->new('horizontal');
my $opt=::NewPrefEntry('mpvoptions',_"mpv options :", sizeg1=>$sg1);
$vbox->pack_start($_,::FALSE,::FALSE,2), for $opt;
return $vbox;
}
# Volume functions
sub GetVolume {$::Volume}
sub GetMute {$::Mute}
sub SetVolume
{ shift;
my $set=shift;
if ($set eq 'mute') { $::Mute=$::Volume; $::Volume=0; }
elsif ($set eq 'unmute') { $::Volume=$::Mute; $::Mute=0; }
elsif ($set=~m/^\+(\d+)$/) { $::Volume+=$1; }
elsif ($set=~m/^-(\d+)$/) { $::Volume-=$1; }
elsif ($set=~m/(\d+)/) { $::Volume =$1; }
$::Volume=0 if $::Volume<0;
$::Volume=100 if $::Volume>100;
my $vol= convertvolume($::Volume);
send_cmd('set', 'volume', $vol);
::HasChanged('Vol');
$::Options{Volume}=$::Volume;
$::Options{Volume_mute}=$::Mute;
}
sub convertvolume
{ my $vol=$_[0];
#$vol= 100*($vol/100)**3; #convert a linear volume to cubic volume scale #doesn't seem to be needed in mpv
# will be sent to mpv as string, make sure it use a dot as decimal separator
::setlocale(::LC_NUMERIC, 'C');
$vol="$vol";
::setlocale(::LC_NUMERIC, '');
return $vol;
}
sub set_equalizer
{ my (undef,$val)=@_;
send_cmd('af','add','@EQ:equalizer='.$val);
}
sub EQ_Get_Range
{ return (-12,12,'dB');
}
sub EQ_Get_Hz
{ my $i=$_[1];
# mplayer and GST equalizers use the same bands, but they are indicated differently
# mplayer docs list band center frequences, GST reports band start freqs. Using GST values here for consistency
my @bands=(qw/29Hz 59Hz 119Hz 237Hz 474Hz 947Hz 1.9kHz 3.8kHz 7.5kHz 15.0kHz/);
return $bands[$i];
}
sub get_RG_opts
{ my $enable = $::Options{use_replaygain} ? 'yes' : 'no';
my $mode = $::Options{rg_albummode} ? 'replaygain-album' : 'replaygain-track';
my $clip = $::Options{rg_limiter} ? 'yes' : 'no';
my $preamp = $::Options{rg_preamp};
#FIXME: enforce limits in interface
$preamp = -15 if $::Options{rg_preamp}<-15;
$preamp = 15 if $::Options{rg_preamp}>15;
my $RGstring = "\@RG:volume=0:$mode=$enable:replaygain-clip=$clip:replaygain-preamp=$preamp";
return $RGstring;
}
sub RG_set_options
{ my $RGstring = get_RG_opts();
send_cmd('af', 'add', $RGstring);
}
1;